US3975304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating a substrate with soft particles
Assignee: SAES Getters SpA
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Filing: 1974-12-11
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Granted: 1976-08-17
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Expires: 1994-12-11
Abstract
Abstract A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than the substrate and are harder than the intermediate body, and B. attachment-resistant particles having at least one property selected from the group consisting of: 1. a hardness less than that of the substrate and 2. a size such that they pass through a screen of 270 mesh per inch, Ii. compressing the substrate and intermediate body, with particles therebetween whereby the intermediate body pushes the hard substrate-embedding particles into the substrate, and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding particles embedded in the substrate and the attachment-resistant particles adhering to the substrate. The coated substrates produced by the process of the present invention find utility as catalytic devices to accelerate or retard chemical reactions, getter devices and capacitors.
Inventors
- 👤 Paolo della Porta
- 👤 Angelo Cantaluppi
- 👤 Bruno Ferrario
- 👤 Paolo Montalenti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:16
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/0215; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24413
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
142 words
A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard substrate-embedding particles and are softer than the substrate; Ii. compressing the substrate and intermediate body with particles therebetween whereby the intermediate body pushes the hard substrate-embedding particles into the substrate; and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding particles embedded in the substrate and the soft particles adhering to the substrate, wherein the hard substrate-embedding particles are of a size such that they are retained on a screen of 500 mesh per inch.
Claim 2
Independent Claim
142 words
A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than the substrate and are harder than the intermediate body, and B. soft particles which are softer than the hard substrate-embedding particles and are softer than the substrate; Ii. compressing the substrate and intermediate body with particles therebetween whereby the intermediate body pushes the hard substrate-embedding particles into the substrate; and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding particles embedded in the substrate and the soft particles adhering to the substrate, wherein the hard substrate-embedding particles are of a size such that they are retained on a screen of 500 mesh per inch.
Claim 3
Dependent Claim
55 words
The process of claim 1 wherein the particles are placed on the substrate, and wherein an additional amount of particles are placed platinum, a second intermediate body which is on the side of the substrate opposite the first intermediate body in order to produce a structure having particles attached to both sides of the substrate.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein the hard substrate-embedding particles are of a size such that they pass through a screen of 10 mesh per inch.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein the substrate has a Vickers hardness of 10 to 200 kg/mm 2 .
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein the intermediate body has a Vickers hardness of 100 to 300 kg/mm 2 .
Claim 7
Dependent Claim
21 words
The process of claim 1 wherein the hard substrate-embedding particles have a Vickers hardness of 200 to 2000 kg/mm 2 .
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein the intermediate body has a Vickers hardness at least 50 kg/mm 2 less than that of the hard substrate-embedding particles.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the substrate has a Vickers hardness at least 40 kg/mm 2 less than that of the intermediate body.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein the size of the soft particles is 1/2 to 1/10,000 that of the hard substrate-embedding particles.
Claim 11
Dependent Claim
47 words
The process of claim 1 wherein the hard substrate-embedding particles are those of a non-metal and the soft particles are those of a catalytic metal selected from the group consisting of silver, gold, platinum, copper, mixture thereof and alloys thereof with one another and with other metals.
Claim 12
Dependent Claim
20 words
The process of claim 1 wherein the weight ratio of hard substrate-embedding particles to soft particles is 1:20 to 4:1.
Claim 13
Dependent Claim
14 words
The process of claim 1 wherein the hard substrate-embedding particles are refractory metal oxides.
Claim 14
Independent Claim
124 words
A method of producing a catalytic device having particles of a catalyst metal attached to a substrate without the use of a binder, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than the substrate and are harder than the intermediate body, and B. catalytic soft particles which are softer than the hard particles; Ii. compressing the substrate and intermediate body with particles therebetween, whereby the intermediate body pushes the hard substrate-embedding particles into the substrate and causes the soft particles to adhere to the substrate; and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding and soft particles attached to the substrate.
Claim 15
Independent Claim
124 words
A method of producing a catalytic device having particles of a catalyst metal attached to a substrate without the use of a binder, said method comprising in sequence the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than the substrate and are harder than the intermediate body, and B. catalytic soft particles which are softer than the hard particles; Ii. compressing the substrate and intermediate body with particles therebetween, whereby the intermediate body pushes the hard substrate-embedding particles into the substrate and causes the soft particles to adhere to the substrate; and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding and soft particles attached to the substrate.
Claim 16
Independent Claim
212 words
A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising the steps of: I. disposing between the substrate and an intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than the substrate and are harder than the intermediate body, said hard substrate-embedding particles being selected from the group consisting of zirconium, vanadium, tantalum, titanium, silicon carbide, silicon nitride, boron nitride, silica, and alumina, and B. soft particles which are softer than the hard substrate-embedding particles, said soft particles being selected from the group consisting of silver, gold, platium, copper, mixtures thereof and alloys thereof with one another and with other metals. Ii. passing the substrate and intermediate body, with particles therebetween, between the nip of two rotating rolls wherein the distance between the rolls is less than the thickness of the substrate and intermediate body with particles therebetween, whereby the intermediate body pushes the hard substrate-embedding particles into the substrate without substantially reducing the surface area of the soft particles, and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding particles embedded in the substrate wherein the substrate is made of a material selected from the group consisting of soft iron, steel, aluminum and stainless steel.
Claim 17
Independent Claim
212 words
A method of producing a substrate having a particulate coating of high surface area to mass ratio, said method comprising the steps of: I. disposing between the substrate and an intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than the substrate and are harder than the intermediate body, said hard substrate-embedding particles being selected from the group consisting of zirconium, vanadium, tantalum, titanium, silicon carbide, silicon nitride, boron nitride, silica, and alumina, and B. soft particles which are softer than the hard substrate-embedding particles, said soft particles being selected from the group consisting of silver, gold, platium, copper, mixtures thereof and alloys thereof with one another and with other metals. Ii. passing the substrate and intermediate body, with particles therebetween, between the nip of two rotating rolls wherein the distance between the rolls is less than the thickness of the substrate and intermediate body with particles therebetween, whereby the intermediate body pushes the hard substrate-embedding particles into the substrate without substantially reducing the surface area of the soft particles, and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding particles embedded in the substrate wherein the substrate is made of a material selected from the group consisting of soft iron, steel, aluminum and stainless steel.
Claim 18
Independent Claim
160 words
A method of producing a substrate, having a particulate coating of high surface area to mass ratio, comprising the steps of: I. disposing between a substrate and intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than both the substrate and the intermediate body and of a size such that they are retained on a screen of 500 mesh per inch and B. attachment-resistant particles having at least one property selected from the group consisting of: (1) a hardness less than that of the substrate and (b) a size such that they pass through a screen of 270 mesh per inch. Ii. compressing the substrate and intermediate body with particles therebetween whereby the intermediate body embeds the hard substrate-embedding particles into the substrate thereby adhering the attachment-resistant particles onto the substrate, and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding particles embedded into the substrate, and the attachment-resistant particles adhered to the substrate.
Claim 19
Independent Claim
160 words
A method of producing a substrate, having a particulate coating of high surface area to mass ratio, comprising the steps of: I. disposing between a substrate and intermediate body a mixture comprising: A. hard substrate-embedding particles which are harder than both the substrate and the intermediate body and of a size such that they are retained on a screen of 500 mesh per inch and B. attachment-resistant particles having at least one property selected from the group consisting of: (1) a hardness less than that of the substrate and (b) a size such that they pass through a screen of 270 mesh per inch. Ii. compressing the substrate and intermediate body with particles therebetween whereby the intermediate body embeds the hard substrate-embedding particles into the substrate thereby adhering the attachment-resistant particles onto the substrate, and Iii. removing the intermediate body from the particles leaving the hard substrate-embedding particles embedded into the substrate, and the attachment-resistant particles adhered to the substrate.
Claim 20
Dependent Claim
14 words
The method of claim 15 wherein the substrate is softer than the intermediate body.
Claim 21
Dependent Claim
223 words
A method of producing a substrate, having a particulate coating of high surface area to mass ratio, as claimed in claim 15, comprising the steps of: I. disposing between a substrate and an intermediate body a mixture comprising: A. hard substrate embedding particles which are harder than the substrate and which are of a size such that they pass through a screen of 10 mesh per inch but are retained on a screen of 500 mesh per inch and B. soft particles which are softer than the substrate and are of a size such that they are 0.5 to 10.sup. -4 times the size of the hard substrate-embedding particles, Ii. compressing the substrate and intermediate body whereby the hard substrate-embedding particles are pushed into the substrate and Iii. removing the intermediate body thereby leaving the hard substrate-embedding particles embedded in the substrate and the soft particles adhered to the substrate wherein the intermediate body has a Vickers hardness of at least 50 kg/mm 2 less than the hard substrate-embedding particles, the substrate has a Vickers hardness of at least 40 kg/mm 2 less than the intermediate body and the soft particles have a hardness equal to or less than that of the substrate, and wherein the ratio of hard substrate-embedding particles to the soft particles is in the range of 1:20 and 4:1.
Claim 22
Dependent Claim
211 words
A method of producing a substrate, having a particulate coating of high surface area to mass ratio, as recited in claim 15, comprising the steps of: I. disposing between a substrate and an intermediate body a mixture of particles comprising: A. hard substrate-embedding particles which are harder than the substrate and are of a size such that they pass through a screen of 100 mesh per inch but are retained on a screen of 500 mesh per inch and B. attachment-resistant particles which are of a size such that they pass through a screen of 500 mesh per inch, Ii. compressing the substrate and the intermediate body whereby the hard substrate-embedding particles are pushed into the substrate, Iii. removing the intermediate body from the particles thereby leaving the hard substrate-embedding particles embedded in the substrate and the attachment-resistant particles adhered to the substrate, wherein the intermediate body has a Vickers hardness of at least 50 kg/mm 2 less than the hard substrate-embedding particles, the substrate has a Vickers hardness of at least 40 kg/mm 2 less than the intermediate body and the attachment-resistant particles are of any hardness, and wherein the ratio of substrate-embedding particles to the attachment-resistant particles is in the range of 1 : 20 to 4 : 1.
References Cited (Backward Citations)
US3652317A
Cited
US3746658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |